How to add global configuration parameter to Glidein Factory entries
To add a configuration parameter that effect all the factory entries, add an <attr ...> </attr> tag to /glidein/attrs section

How to add local configuration parameter to Glidein Factory entries
To add a configuration parameter to a specific factory entry, add an <attr ...> </attr> tag to /glidein/entries/entry/attrs section

How to configure GlideinWMS to retrieve core files produced by user jobs
In the Factory configuration in the <entry> tag, the rsl attribute
should contain condor_submit=('+Coresize' 'Unlimited').
Example (all on one line):